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[thirdparty/glibc.git] / rt / aio_cancel.c

diff --git a/rt/aio_cancel.c b/rt/aio_cancel.c
index c1cfea50c8f78c66551ea7c64d1f833ab3b95871..9abde1bb8f7f49fb9a7c58390688316c24f79b1e 100644 (file)
--- a/rt/aio_cancel.c
+++ b/rt/aio_cancel.c
@@ -1,22 +1,20 @@
-/* Cancel requests associated with given file descriptor.
-   Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
+/* Cancel requests associated with given file descriptor.  Stub version.
+   Copyright (C) 2001-2019 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
 
    The GNU C Library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
+   Lesser General Public License for more details.
 
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
 
 
 /* We use an UGLY hack to prevent gcc from finding us cheating.  The
@@ -29,114 +27,16 @@
 /* And undo the hack.  */
 #undef aio_cancel64
 
-#include <assert.h>
 #include <errno.h>
 
-#include "aio_misc.h"
-
-
 int
-aio_cancel (fildes, aiocbp)
-     int fildes;
-     struct aiocb *aiocbp;
+aio_cancel (int fildes, struct aiocb *aiocbp)
 {
-  struct requestlist *req = NULL;
-  int result = AIO_ALLDONE;
-
-  /* Request the mutex.  */
-  pthread_mutex_lock (&__aio_requests_mutex);
-
-  /* We are asked to cancel a specific AIO request.  */
-  if (aiocbp != NULL)
-    {
-      /* If the AIO request is not for this descriptor it has no value
-        to look for the request block.  */
-      if (aiocbp->aio_fildes == fildes)
-       {
-         struct requestlist *last = NULL;
-
-         req = __aio_find_req_fd (fildes);
-
-         if (req == NULL)
-           {
-           not_found:
-             pthread_mutex_unlock (&__aio_requests_mutex);
-             __set_errno (EINVAL);
-             return -1;
-           }
-
-         while (req->aiocbp != (aiocb_union *) aiocbp)
-           {
-             last = req;
-             req = req->next_prio;
-             if (req == NULL)
-               goto not_found;
-           }
-
-         /* Don't remove the entry if a thread is already working on it.  */
-         if (req->running == allocated)
-           {
-             result = AIO_NOTCANCELED;
-             req = NULL;
-           }
-         else
-           {
-             /* We can remove the entry.  */
-             __aio_remove_request (last, req, 0);
-
-             result = AIO_CANCELED;
-
-             req->next_prio = NULL;
-           }
-       }
-    }
-  else
-    {
-      /* Find the beginning of the list of all requests for this
-        desriptor.  */
-      req = __aio_find_req_fd (fildes);
-
-      /* If any request is worked on by a thread it must be the first.
-        So either we can delete all requests or all but the first.  */
-      if (req != NULL)
-       {
-         if (req->running == allocated)
-           {
-             struct requestlist *old = req;
-             req = req->next_prio;
-             old->next_prio = NULL;
-
-             result = AIO_NOTCANCELED;
-
-             if (req != NULL)
-               __aio_remove_request (old, req, 1);
-           }
-         else
-           {
-             result = AIO_CANCELED;
-
-             /* We can remove the entry.  */
-             __aio_remove_request (NULL, req, 1);
-           }
-       }
-    }
-
-  /* Mark requests as canceled and send signal.  */
-  while (req != NULL)
-    {
-      struct requestlist *old = req;
-      assert (req->running == yes || req->running == queued);
-      req->aiocbp->aiocb.__error_code = ECANCELED;
-      req->aiocbp->aiocb.__return_value = -1;
-      __aio_notify (req);
-      req = req->next_prio;
-      __aio_free_request (old);
-    }
-
-  /* Release the mutex.  */
-  pthread_mutex_unlock (&__aio_requests_mutex);
-
-  return result;
+  __set_errno (ENOSYS);
+  return -1;
 }
 
 weak_alias (aio_cancel, aio_cancel64)
+
+stub_warning (aio_cancel)
+stub_warning (aio_cancel64)